TABLE 2.
One Way Analysis of Variance (ANOVA) of tumor-ears associated with hearing loss progression (> 10 dB) compared to those with stable hearing (<10 dB)
| All ears (n=111) | < <10 dB hearing loss (n=75) | ≥ 10 dB hearing loss (n=36) | ANOVA | |||||
|---|---|---|---|---|---|---|---|---|
| M | SD | M | SD | M | SD | F-value | p-value | |
| Age (years) | 30.9 | 19.2 | 30.6 | 19.7 | 31.4 | 18.5 | 0.0 | 0.83586 |
| 4f-PTA | ||||||||
| Baseline | 23.8 | 22.4 | 19.5 | 21.8 | 32.6 | 21.2 | 8.9 | 0.00343 |
| Net decrease | 9.9 | 16.9 | 1.5 | 4.2 | 27.4 | 19.9 | 117.3 | < 0.0001 |
| AHDR | 2.6 | 4.4 | 0.3 | 1.7 | 7.2 | 4.7 | 124.7 | < 0.0001 |
| IAC tumor volume (mm3) | ||||||||
| Baseline | 165.1 | 144.5 | 132.4 | 124.2 | 233.2 | 161.0 | 13.1 | 0.00044 |
| Net growth | 105.2 | 107.4 | 101.0 | 97.9 | 114.1 | 126.1 | 0.4 | 0.55012 |
| Growth rate (mm3/year) | 31.0 | 38.4 | 31.5 | 39.8 | 30.0 | 35.6 | 0.0 | 0.84877 |
| PF tumor volume (mm3) | ||||||||
| Baseline | 90.1 | 153.0 | 89.2 | 159.0 | 92.1 | 141.7 | 0.0 | 0.92575 |
| Net growth | 444.7 | 1186.2 | 313.5 | 883.6 | 718.0 | 1630.4 | 2.9 | 0.09273 |
| Growth rate (mm3/year) | 119.4 | 304.3 | 94.7 | 265.8 | 170.9 | 370.9 | 1.5 | 0.21871 |
| Total tumor volume (mm3) | ||||||||
| Baseline | 255.3 | 247.3 | 221.7 | 240.6 | 325.3 | 249.8 | 4.4 | 0.03810 |
| Net growth | 549.9 | 1212.4 | 414.5 | 912.7 | 832.1 | 1654.5 | 2.9 | 0.08942 |
| Growth rate (mm3/year) | 150.4 | 312.4 | 126.2 | 278.0 | 200.9 | 373.4 | 1.4 | 0.24023 |
4f-PTA: Four frequency pure tone average (0.5, 1, 2, 4 kHz), AHDR: annual hearing decrease rate (dB/year), IAC: internal auditory canal, PF: posterior fossa